Quality and cost control of injection molded products start with material selection. Common injection molding materials have their own characteristics: PP has high cost-effectiveness and is suitable for daily necessities and automotive interiors; ABS has excellent comprehensive performance and is the preferred choice for electronic device casings; PC high transparency and temperature resistance, suitable for medical devices and lampshades; PA has high wear resistance and is suitable for mechanical components such as gear bearings.

The selection of materials should follow three principles: prioritize low-cost materials such as PP and PE for general scenarios; High performance requirements can be met by selecting engineering plastics such as PC and PA; Elastic components are replaced with TPE/TPU instead of rubber. Key considerations include fluidity (PP/ABS for complex structures), temperature resistance (PC/PA for high temperature environments), mechanical strength (PA/POM for load-bearing components), and compliance requirements (PP/PE/PET for food contact). Through scientific selection, material costs can be reduced by 15% -20% while ensuring quality.